1/* 2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10#include <stdio.h> 11#include "internal/cryptlib.h" 12#include <openssl/evp.h> 13#include <openssl/objects.h> 14#include <openssl/x509.h> 15#include "crypto/evp.h" 16 17static int init(EVP_MD_CTX *ctx) 18{ 19 return 1; 20} 21 22static int update(EVP_MD_CTX *ctx, const void *data, size_t count) 23{ 24 return 1; 25} 26 27static int final(EVP_MD_CTX *ctx, unsigned char *md) 28{ 29 return 1; 30} 31 32static const EVP_MD null_md = { 33 NID_undef, 34 NID_undef, 35 0, 36 0, 37 EVP_ORIG_GLOBAL, 38 init, 39 update, 40 final, 41 NULL, 42 NULL, 43 0, 44 sizeof(EVP_MD *), 45}; 46 47const EVP_MD *EVP_md_null(void) 48{ 49 return &null_md; 50} 51